I've had a humidifier and a cat drinking fountain both develop
unexplained leaks. They both consist of a hard plastic base and a
water reservoir that sits in the base, with a part that lets water
into the base as the level drops. The humidifier has a second part
which is a wick and a fan, the fountain has a pump to drop water into
the open portion so the cats have fresh aerated water.
Each is about three years old. The humidifier was stored in the
basement and when I put it together for this winter and put in a new
wick, it leaks. I replaced the part that feeds the water with a new
one, and it still leaks. I cannot figure out where it is leaking from.
The cat fountain was in continuous use until a few months ago when it
started leaking. Again, I cannot figure out where the leak is coming
from. It looks fine, and a few hours later a pool has formed on the
floor. The water level looks no higher than normal.
All I can think of is that the hard plastic base(s) has somehow
developed a permeability to water. Can that be?
I'm pretty mystified. I've replaced both humidifier and cat fountain
(neither leaks) but I'm still curious.